scada VS bms

1. SCADA Vs BMS
SCADA System

Supervisory Control and Data
BMS System

Building Management system
g
Acquisition
Meanin

Electrical power transmission and
distribution.

All Kinds of buildings.

Airports.
ge

Manufacturing and production.

Power generation, fabrication, and refining.

Hospitals.

Ships.

Hotels
Usag

Water treatment and distribution.

Wastewater collection and treatment.

Hotels
.

Schools and universities.

Oil and gas pipelines.

Large communication systems.
They monitor and control HVAC, access, and energy consumption

2. SCADA Vs BMS
SCADA System
BMS System

A
Human-Machine Interface
(
HMI
)

A
Human
-
Machine
Interface
(HMI)
()
which is the apparatus that
presents the process data to a
human operator to monitor and control
the
process

A
Human
-
Machine
Interface
(HMI)
which is the apparatus that presents the process data to a human operator to monitor and
onents
control
the
process
.

A supervisory (computer) system, gathering (acquiring) data on the process
and
sending
commands
control the process.

A supervisory (computer) system, gathering (acquiring) data from the Pl t
d
di
d
m Compo
process
and
sending
commands
(control) to the process.

Remote Terminal Units (RTUs) connectin
g
to sensors in the
Pl
an
t
an
d
sen
di
ng comman
d
s
(control) to field devices.
(C)
System
g
process, converting sensor signals to digital data and sending digital data to the supervisory system.

Direct digital controllers
(
DD
C)
with remote I/O modules.

Programmable Logic Controller (PLCs) are used because they are more economical, versatile, flexible and configurable than flexible
,
and

configurable

than

special-purpose RTUs.

3. SCADA Vs BMS
SCADA System
BMS System

Life time 12-15 Years

Life Time 7-10
y
ears

More robust material

Control actions is taken by the RTU
’s
and
PLc
’s
in
max
250
y

Economical material.

Control actions is taken by the DDC
within
2
to
2
.
5
seconds
.
nce
RTU s
and
PLc s
in
max
250
millisec.

Redundancy is a standard in the
HMI computers.
DDC
within
2
to
2
.
5
seconds
.

Redundancy is optional. Alarms
performance
ithin
40
50
rforman

Alarms performance within 15 sec.

Very fast trending and logging of historical data and alarms.

Alarms
performance
w
ithin
40
-
50
sec and depends on the alarm Que.

Trending
and
logging
happens
Per

Trending
and
logging
happens
with normal speed and aso depends on each vendor.

4. SCADA Vs BMS
SCADA System
BMS System

Not so familia
r
with the HVAC

S
p
ecialized in the HVAC
p
rotocols
ges
standard protocols ( Bacnet,
LONWORKS) it uses either
Modbus or Profibus
p
p
DDC controls can communicate with either Bacnet or LONworks.

Very open to third party interfaces
dvantag

Very week in third part interface and should be by modbus or Profibus only. Hi h
iitil
t
(Powe
r
meters, variable speed
drives, ..etc)

Lower initial cost.
es/Disad

Hi
g
h
e
r
in
iti
a
l
cos
t
.

Higher operation cost as it needs qualified and trained people for operation

Lower operating cost.

Lower spare parts.
vantage
operation
.

Higher spare parts
Adv